Information
- Publication Type: PhD-Thesis
- Workgroup(s)/Project(s): not specified
- Date: 2019
- Open Access: no
- Rigorosum: 8. February 2019
- First Supervisor: Hannes Kaufmann
- Keywords: virtual reality, multi-user VR
Abstract
The research presented in this dissertation focuses on multi-user VR, where multiple immersed users navigate the virtual world by physically walking in a large tracking area. In such a setup, different combinations of user colocation within the physical and the virtual space are possible. We consider a setup to be multi-user if at least one of these two spaces is shared. The dissertation starts with the classification of combinations of physical and virtual colocation. Four such combinations are defined: colocated shared VR, colocated non-shared VR, distributed shared VR and shared VR with mixed colocation. The characteristics of each of these four setups are discussed and the resulting problems and research questions outlined. The dissertation continues with the description of ImmersiveDeck - a large-scale multi-user VR platform that enables navigation by walking and natural interaction. Then, four experiments on multi-user walkable VR developed with the use of ImmersiveDeck are described. The first two experiments are set in colocated non-shared VR where walking users share a tracking space while being immersed into separate virtual worlds. We investigate users´ mutual awareness in this setup and explore methods of preventing mutual collisions between walking users. The following two experiments study shared VR scenarios in situations of varied physical colocation. We investigate the effects that different modes of physical colocation have on locomotion, collision avoidance and proxemics patterns exhibited by walking users. The sense of copresence and social presence within the virtual world reported by users is investigated as well. The experiments in the colocated non-shared VR setup show that HMD-based VR can produce immersion so strong that users do not notice others being present in their immediate proximity, thus making collision prevention the task of utmost importance. In our proposed method of displaying notification avatars to prevent potential imminent collisions between colocated users, the suitability of a particular type of notification avatar was found to be dependent on the type of scenario experienced by users. The general result of the experiments in shared VR is that physical colocation affects locomotor and proxemics behavior of users as well as their subjective experience in terms of copresence. In particular, users are more cautious about possible collisions and more careful in their collision avoidance behavior in the colocated setup compared to the real environment. In the distributed setup, conventional collision avoidance is often abandoned. viAdditional Files and Images
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Weblinks
BibTeX
@phdthesis{podkosova-2019-MVR,
title = "Walkable Multi-User VR: Effects of Physical and Virtual
Colocation",
author = "Iana Podkosova",
year = "2019",
abstract = "The research presented in this dissertation focuses on
multi-user VR, where multiple immersed users navigate the
virtual world by physically walking in a large tracking
area. In such a setup, different combinations of user
colocation within the physical and the virtual space are
possible. We consider a setup to be multi-user if at least
one of these two spaces is shared. The dissertation starts
with the classification of combinations of physical and
virtual colocation. Four such combinations are defined:
colocated shared VR, colocated non-shared VR, distributed
shared VR and shared VR with mixed colocation. The
characteristics of each of these four setups are discussed
and the resulting problems and research questions outlined.
The dissertation continues with the description of
ImmersiveDeck - a large-scale multi-user VR platform that
enables navigation by walking and natural interaction. Then,
four experiments on multi-user walkable VR developed with
the use of ImmersiveDeck are described. The first two
experiments are set in colocated non-shared VR where walking
users share a tracking space while being immersed into
separate virtual worlds. We investigate users´ mutual
awareness in this setup and explore methods of preventing
mutual collisions between walking users. The following two
experiments study shared VR scenarios in situations of
varied physical colocation. We investigate the effects that
different modes of physical colocation have on locomotion,
collision avoidance and proxemics patterns exhibited by
walking users. The sense of copresence and social presence
within the virtual world reported by users is investigated
as well. The experiments in the colocated non-shared VR
setup show that HMD-based VR can produce immersion so
strong that users do not notice others being present in
their immediate proximity, thus making collision prevention
the task of utmost importance. In our proposed method of
displaying notification avatars to prevent potential
imminent collisions between colocated users, the
suitability of a particular type of notification avatar was
found to be dependent on the type of scenario experienced by
users. The general result of the experiments in shared VR
is that physical colocation affects locomotor and proxemics
behavior of users as well as their subjective experience in
terms of copresence. In particular, users are more cautious
about possible collisions and more careful in their
collision avoidance behavior in the colocated setup compared
to the real environment. In the distributed setup,
conventional collision avoidance is often abandoned. vi",
address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria",
school = "Research Unit of Computer Graphics, Institute of Visual
Computing and Human-Centered Technology, Faculty of
Informatics, TU Wien ",
keywords = "virtual reality, multi-user VR",
URL = "https://www.cg.tuwien.ac.at/research/publications/2019/podkosova-2019-MVR/",
}